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Test Item Tree
Test item tree helps to determine the risk for every component in the application. What is Test item tree? Can you provide an example that helps to create a test item tree?


  
Total Answers and Comments: 1 Last Update: February 25, 2009     Asked by: kamal1_batra 
  
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No best answer available. Please pick the good answer available or submit your answer.
February 24, 2009 06:14:42   #1  
mathan_vel Member Since: December 2007   Contribution: 422    

RE: Test Item Tree
Test Item tree is a data analytical method which allows constructing a hierarchical structure on the items of a questionnaire or test from observed response patterns.

Assume that we have a questionnaire with m items(see below q1 q2 q3 etc..) and that subjects can answer positive (1) or negative (0) to each of these items i.e. the items are dichotomous. If n subjects answer the items this results in a binary data matrix D with m columns and n rows. Typical examples of this data format are test items which can be solved n(1 )or failed n(2) by subjects. Other typical examples are questionnaires where the items are statements to which subjects can agree (1) or disagree (0).
The goal of an Test Item Tree is to uncover such deterministic implications from the data set.

m

n(1)

n(2)

q1

a

b

q2

a

b

q3

a

b


 
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Test item tree helps to determine the risk for every component in the application. What is Test item tree? Can you provide an example that helps to create a test item tree? 
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